In 2010 Herreros Arquitectos completed the industrialized prototype for their growing house, which focuses on resource efficiency, recycling and sustainability. During the first phase of construction 4 sections are transported via truck, then hoisted into place on top of a foundation of piers. After all the modules are in place the exterior skin is sealed up. Each module is fabricated in a factory and includes all the interior finishes, built-in furniture and part of the exterior.

The modules are the maximum size for shipment via roads in Spain (3m wide, 2.50m high, and up to 12m long), which is much smaller than what we can transport in the US. Limitations in transport sizes, whether in the US or Europe, have a huge effect on the design of prefab homes.